Description

Risk time (person-years) in the Danish population, classified by sex, age, period and
date of birth in 1-year classes. This corresponds to triangles in a Lexis diagram.

Usage

1

Format

A data frame with 13860 observations on the following 6 variables.

sex

Sex. 1:males, 2:females

A

One-year age class

P

Period

C

Birth cohort

Y

Person-years

upper

Indicator of upper triangle in the Lexis diagram

Details

The risk time is computed from the population size figures in N.dk,
using the formulae devised in B. Carstensen:
"Demography and epidemiology: Age-Period-Cohort models in the computer age",
http://biostat.ku.dk/reports/2006/ResearchReport06-1.pdf/, later
published as:
B. Carstensen: Age-period-cohort models for the Lexis diagram.
Statistics in Medicine, 10; 26(15):3018-45, 2007.